Food Shelf Life Calculator

Food safety and shelf life depend on storage conditions, packaging integrity, and the food type. Best before dates indicate quality; use by dates indicate genuine food safety limits

The calculator uses the standard published formula for food shelf life. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Use by = Safety limit - do not consume after this date regardless of appearance or smell. Each step in the calculation is shown so you can verify the result manually.